Stages for tankers - by controlling ground vehicles: Stages for pilots - by controlling of the aircraft:
Destroy 40 enemies (x2 RB, x3 SB);
Get the achievement “Supporting fire” (help for destroying in a squad) 5 times;
Win 10 times (with activity in battle of more than 70%);
Finish the battle in 1st place four times (while either winning or losing the battle);
Destroy 12/6/3 enemies in 1 battle (AB, RB, SB) while controlling a ground vehicle.

Destroy 30 enemies (x2 RB, x3 SB);
Get the achievement “Supporting fire” (help for destroying in a squad) 4 times;
Win 10 times (with activity in battle more than 60%);
Finish the battle in 1st place four times (while either winning or losing the battle);
Destroy 10/5/3 enemies in 1 battle (AB, RB, SB) while controlling an aircraft.

これを期間中6回か11回クリアすればいい